The effect of surface modification with silane coupling agent on suppressing the photo-catalytic activity of fine TiO2 particles as inorganic UV filter

Ukaji, Emi; Furusawa, Takeshi; Sato, Masahide; Suzuki, Noboru

doi:10.1016/j.apsusc.2007.06.061

Cited by 282 publications

(157 citation statements)

References 18 publications

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“…Silane reagents in the form of Xn-Si-(R)4−n, (where; R = alkyl/organic fragment, X = halide or other reactive species; Figure 1) are examples of polyfunctional molecules bonding reaction commonly used for surface modification [12][13][14]. In addition, organofunctional silanes behave as hybrids between silica and organic materials making them one of the best choice for coupling agents [15][16][17][18][19][20][21][22][23]. Silanes, as surface modifying reagents, are known to readily chemisorb on most materials to either form entangled covalent networks, cross-linked monolayers or, in the case of silanols on hydroxylated surfaces, monolayers derived from hydrogen-bonding networks ( Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Revisiting the Challenges in Fabricating Uniform Coatings with Polyfunctional Molecules on High Surface Energy Materials

et al. 2015

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Abstract:Modifying the chemistry of a surface has been widely used to influence interfacial properties of a material or nature of interaction between two materials. This article provides an overview on the role of polyfunctional molecules, specifically silanes, in surface modification of polar surfaces (bearing soft nucleophiles). An emphasis on the mechanism of the reaction in the presence of adsorbed water, where the modifying reagents are hydrolysable, is discussed. To highlight the complexity of the reaction, modification of paper with trichlorosilanes is highlighted. Preparation of hydrophobic cellulosic paper, and structure-property relations under different treatment conditions is used to highlight that a monolayer is not always formed during the surface modification. Gel-formation via step-growth polymerization suggests that at the right monomer:adsorbed water ratio, a monolayer will not form but rather self-assembly driven particle formation will occur leading to a textured surface. The review highlights recent work indicating that the focus on monolayer formation, is at the very least, not always the case but gel formation, with concomitant self-assembly, might be the culprit in understanding challenges associated with the use of polyfunctional molecules in surface modification. OPEN ACCESSCoatings 2015, 5 1003

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Section: Introductionmentioning

confidence: 99%

Revisiting the Challenges in Fabricating Uniform Coatings with Polyfunctional Molecules on High Surface Energy Materials

et al. 2015

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“…Photochemical oxidations for the removal of organic contaminants by Semiconductor Metal Oxides (SMOs) have been widely studied in the literatures [1][2][3][4][5][6]. Among these, TiO 2 NPs have been more extensively studied for their use in photovoltaic cells, electrochromic materials, photocatalysis, and waste water treatments [5].…”

Section: Introductionmentioning

confidence: 99%

“…Among these, TiO 2 NPs have been more extensively studied for their use in photovoltaic cells, electrochromic materials, photocatalysis, and waste water treatments [5]. Super-ne titanium dioxide particles in the nanometer scale with high transparency have also been used for shielding against a broad range of UV wavelengths [6].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and study of UV-shielding and photocatalytic performance of uniform TiO2/SiO2 core-shell nanofibers via single-nozzle co-electrospinning and interface sol–gel reaction

Nakhaei¹,

Shahtahmassebi²,

Roknabadi³

et al. 2016

Scientia Iranica

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Abstract. One-dimensional TiO2/SiO2 core-shell nano bers were fabricated using a single-nozzle co-electrospinning process with phase-separated, mixed polymer composite solution. The core and shell were composed of Polyvinylpyrrolidone (PVP) and Polyacrylonitrile (PAN) polymers with uniform distribution of TiO 2 and SiO 2 nanoparticles (NPs), respectively. The NPs were synthesized via sol-gel reaction, simultaneously, in the respective polymer solutions. The morphologies and structures of the fabricated TiO2/SiO2 core-shell nano bers were investigated by XRD, FTIR, SEM, EDS, and TEM images. The in uences of di erent amounts of TiO2 and SiO2 precursors on the photocatalytic and UVshielding performance of TiO 2 /SiO 2 core-shell nano bers were studied. Photocatalytic activity of the nano bers was evaluated by observing photo-degradation of Methyl Orange (MO) aqueous solution under irradiation of ultraviolet (UV) light. Our results for the TiO 2 /SiO 2 core-shell nano bers indicate good potential for superior applications in photocatalytic and UV shielding devices.

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“…The electrostatic interaction between the carboxylic groups of BSA adsorbed onto silica particles and the amino groups on the Si wafers led to the arrangement of silica particles. Silane coupling agents are also used to suppress the photocatalytic activity of titania 33,34 . Using titania modified with silane coupling agents having amino groups can control the adsorption/desorption properties, owing to the electrostatic interaction and photoinduced superhydrophilic surfaces without the decomposition of BSA.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and BSA Adsorption/Desorption Properties of Titania/Silica Composite Films Modified with Silane Coupling Agents

et al. 2014

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The effect of surface modification with silane coupling agent on suppressing the photo-catalytic activity of fine TiO2 particles as inorganic UV filter

Cited by 282 publications

References 18 publications

Revisiting the Challenges in Fabricating Uniform Coatings with Polyfunctional Molecules on High Surface Energy Materials

Revisiting the Challenges in Fabricating Uniform Coatings with Polyfunctional Molecules on High Surface Energy Materials

Fabrication and study of UV-shielding and photocatalytic performance of uniform TiO2/SiO2 core-shell nanofibers via single-nozzle co-electrospinning and interface sol–gel reaction

Fabrication and BSA Adsorption/Desorption Properties of Titania/Silica Composite Films Modified with Silane Coupling Agents

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